The hack would probably be “find a good classmate and let them give you a summary”. For a real solution, learn about “efficient reading skills” - many universities offer material on this. But that’s not a hack, it’s a technique.
– StephieOct 22 '18 at 19:11

What do you mean by "complete" - reading, understanding, rewriting or answering the questions, etc?
– LawrenceOct 23 '18 at 0:14

I think what you need to learn is how to do 'skimming text' (getting the main idea of a text) and 'scanning text' (searching for specific piece of information within a text). You can find a lot of useful tips about them on the web (they take some time to master, but they are both very useful skills to have).

Specifically on your question, it all depends on the subject and the way the book is written, but if you are certain that all important information from the chapter is covered in the questions, you could start from there (and use the scanning and skimming techniques to find the answers within the main text).

(The skimming and scanning techniques are needed, along with other situations, to complete the reading comprehension parts of some exams where it is not possible timewise to read the whole text.)